Pendulum-regulator for clocks.



No. 709,594. Patented Sept. 23, I902.

J. BUTCHER.

PENDULUM REGULATOR FOR CLOCKS.

(Application filed Feb. 21, 1902.

(No Model.)

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UNITED STATES PATENT OFFICE.

JOSEPH BUTCHER, OF NEl/V YORK, N. Y.

PENDULUM-REGULATOR FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No. 709,594, datedSeptember 23, 1902. Application filed February 21, 1902. Serial N0.95,008. (No model.)

To all whom, it may concern:

Be it known that I, JOSEPH BUTCHER, a citi- Zen of the United States,residing in the city, county, and State of New York, have inventedcertain new and useful Improvements in Pendulum-Regulators for Clocks,of which the following is a specification.

This invention relates to means for regulating a clock-pendulum byvarying its length; and it has for its object to provide a single andaccurate device which may be operated from the outside of the clock-caseand one which may be adjusted to suit cases of different dimensions orheights.

In the accompanying drawings, which illustrate an embodiment of theinvention as adapted to an electric clock, Figure 1 is a verticalsection of the clock-case, taken through the center of the dial andshowing the regulator mainly in side elevation. Fig. 2 is a plan of apart of the top of the case. Fig. 3 is an elevation of the pendulum anda part of the regulator, as seen from the left in Fig. 1. Fig. 4 is aplan of the pendulum-fork.

1 designates the base, 2 the top, and 3 the front, of the clock-case,only a part of which is shown, as the particular form, size, andornamentation of the case-are not important to my invention.

4 designates the clock-movem cut as a Whole, and 5 the dial.

On the verge-arbor 6'in the movem en t-frame is the crutch-wire 7,having at its lower end a fork 8, (seen in plan in Fig. 4,) to receivethe stem or rod of the pendulum 9. By pendulum is here meant the bob andthe rod carrying it. At the upper end of the pendulumrod is attached thependulum-spring 10, engaging the crotch 11. The effective length of thependulum is measured from the crotch 11 down to the bob of the pendulum,and this length is varied according to the present invention by raisingor lowering the pendulum, the spring 10 playing through the crotch 11.The means employed for raising or lowering the pendulum comprises ascrew 12, fixed to the upper end of the spring 10, and a wheelnut 13 onsaid screw and rotatively mounted in collared bearings in a bracket 14on some part of the movement-frame or on some adjunct thereto. As shownin Fig. 1, it is on a pillar of the frame, in which is formed the crotch11. The wheel-nut 13 gears with a pinion 15, fixed on an upright arbor16, which has a hearing below in the bracket 14 and extends upwardtelescopically into a tubular arbor 17. This arbor 17 projects upwardthrough the top of the clock-case into a recess 18 in said top, where itis provided with a suitable thumb-piece 19 for rotating the arbor.Practically the arbors 16 and 17 are one, they being sccu red togetherby a set-screw 20 or some other securing device. The object in makingthe arbor 16 17 telescopic is to enable it to be conveniently varied inlength to suit the device to varying conditions, and obviously anydevices equivalent to the telescoping of the arbors may be employed forthe purpose. A wicket;plate 21 may be employed to close the recess 18,so as to exclude therefrom dust and the like. The fork S is flared atits ends, as shown in Fig. 4, so as to prevent the pendulum fromescaping too readily from the fork when the clock is being movedaboutortilted. A lining-cup 22 in the recess 18 may have radialgraduations 23, if desired, as seen in Fig. 2, for effecting niceregulation or adjustm ent of the pendulum in regulating the clock.

Obviously my regulator may be employed with any pendulum-clock and isnot limited to use with an electric clock. I have shown this regulatorin my application for patent for an electric clock filed October 16,1901, under Serial No. 78,785, and allowed January 6, 1902; but it ismerely shown as an adjunct and is not claimed therein.

1 do not wish to restrict myself to the specific construction of theregulating device as herein shown. Obviously mechanical equivalents maybe employed in lieu of the elements shown without departing in anymaterial degree from my invention.

Having thus described my invention, I claim 1. The combination in aclock, of the pendulum, the spring forming a prolongation of the latter,the screw on and forming a prolongation of said spring, the crotch inwhich said spring plays, the nut on said screw, means for collaring saidnut, and means for rotating said nut for raising and lowering thependulum.

2. The combination with a clock-case and a clock inclosed therein, ofthe clock-penduhim, the flat spring forming a prolongation of saidpendulum, the crotch, a screw device for raising and lowering thependulum, and means for operating said screw device, said meanscomprising an arbor extending out at the top of the clock-case, athumb-piece thereon occupying a recess in the top of the case, and apinion thereon gearing with the wheel-nut of the said screw device.

The combination with the case of a clock, having a recess in its top, anarbor extending down from said recess and having a pinion. 15 at itslower end, and the said pinion, the crotch, the pendulum, its spring,engaging said crotch, the screw on the upper end of said spring andparallel with said pinion-arbor, and a collared wheel-nut on said screwand gearing with said pinion.

4:. The combination with a clock-case having a recess in its top, and anextensible arbor extending down into the case from said recess, of theclock'pendulum, its spring, the crotch which said spring engages, thescrew on said spring, and the collared Wheel-nut on said screw.

5. The combination with the movementframe of a clock provided with acrotch for the pendulum-spring, and the case of the clock, having arecess in its top, of the pendulum, its spring, engaging said crotch,the screw on and forming a prolongation upward of said spring, thewheel-nut on said screw, the means on the movement-frame for collaringsaid nut, 'a telescopic and extensible arbor dependent into the casefrom the recess in the top thereof and parallel with the said screw onthe pendulum-spring, a thumbpiece on said arbor in said recess,-and apinion on said arbor and in gear with said wheel-nut.

In witness whereof I have hereunto signed my name, this 18th day ofFebruary, 1902, in the presence of two subscribing witnesses. JOSEPHBUTCHER.

Witnesses: I

HENRY CONNETT, PETER A. Boss.

